Windmere Lake Dam Reservoir Report

Last Updated: December 5, 2025

Windmere Lake Dam, located in Grenada, Mississippi, stands as a vital structure regulating the flow of the Yalobusha River.


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Summary

Built in 1994 by Willis Engineering, Inc., this earth dam serves primarily for recreational purposes, offering a serene environment for water and climate enthusiasts to enjoy. With a height of 15 feet and a length of 400 feet, the dam boasts a storage capacity of 222 acre-feet, providing essential water resources for the surrounding area.

Despite its satisfactory condition assessment as of January 2021, Windmere Lake Dam is classified as having a high hazard potential due to its proximity to populated areas. The dam's spillway, of uncontrolled type, is designed to handle a maximum discharge of 1400 cubic feet per second, ensuring the safety and stability of the structure during extreme conditions. Regular inspections, mandated by the Mississippi Department of Environmental Quality, occur every five years to ensure the dam's continued functionality and safety.

With its moderate risk assessment and state-regulated status, Windmere Lake Dam remains a crucial aspect of water resource management in the region. As water and climate enthusiasts visit this picturesque site for recreational activities, the dam stands as a testament to effective engineering and environmental stewardship in safeguarding the local community and ecosystem.

Year Completed

1994

Dam Length

400

Dam Height

15

River Or Stream

UNT OF YALOBUSHA RIVER

Primary Dam Type

Earth

Surface Area

14

Drainage Area

0.65

Nid Storage

222

Outlet Gates

None

Hazard Potential

High

Nid Height

15
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.